AttributeError: module 'openstack.proxy' has no attribute 'Proxy'

I’m runing an Ussuri install on openSUSE 15.2. According the official install guide, the Keystone, Glance, and Placemente has run withou any bigger issues. But, when i try run any command with nova-manage, i have that message:

AttributeError: module 'openstack.proxy' has no attribute 'Proxy'

That message occurs at every comand with "nova-manage". Especially, i’m executing the step:

Populate the nova-api database:

from the official guide, the command is:

su -s /bin/sh -c "nova-manage api_db sync" nova

Every log has that error, even the journalctl -xe if try to start the service without populate database.

The others services runs fine.

The full log is:

Traceback (most recent call last):
  File "/usr/bin/nova-manage", line 6, in <module>
    from nova.cmd.manage import main
  File "/usr/lib/python3.6/site-packages/nova/cmd/manage.py", line 48, in <module>
    from nova.cmd import common as cmd_common
  File "/usr/lib/python3.6/site-packages/nova/cmd/common.py", line 32, in <module>
    from nova import utils
  File "/usr/lib/python3.6/site-packages/nova/utils.py", line 35, in <module>
    from openstack import connection
  File "/usr/lib/python3.6/site-packages/openstack/__init__.py", line 22, in <module>
    import openstack.connection
  File "/usr/lib/python3.6/site-packages/openstack/connection.py", line 213, in <module>
    class Connection(six.with_metaclass(_meta.ConnectionMeta)):
  File "/usr/lib/python3.6/site-packages/six.py", line 856, in __new__
    return meta(name, resolved_bases, d)
  File "/usr/lib/python3.6/site-packages/openstack/_meta.py", line 47, in __new__
    service_filter_class = _find_service_filter_class(service_type)
  File "/usr/lib/python3.6/site-packages/openstack/_meta.py", line 113, in _find_service_filter_class
    service_filter_module = importlib.import_module(import_name)
  File "/usr/lib64/python3.6/importlib/__init__.py", line 126, in import_module
    return _bootstrap._gcd_import(name[level:], package, level)
  File "/usr/lib/python3.6/site-packages/openstack/baremetal_introspection/baremetal_introspection_service.py", line 14, in <module>
    from openstack.baremetal_introspection.v1 import _proxy
  File "/usr/lib/python3.6/site-packages/openstack/baremetal_introspection/v1/_proxy.py", line 23, in <module>
    class Proxy(proxy.Proxy):
AttributeError: module 'openstack.proxy' has no attribute 'Proxy'